require 'digest/sha1'
class Player < ActiveRecord::Base
  # Virtual attribute for the unencrypted password
  attr_accessor :password
  attr_protected :activated_at
  validates_presence_of     :login, :email
  validates_presence_of     :password,                   :if => :password_required?
  validates_presence_of     :password_confirmation,      :if => :password_required?
  validates_length_of       :password, :within => 4..40, :if => :password_required?
  validates_confirmation_of :password,                   :if => :password_required?
  validates_length_of       :login,    :within => 3..40
  validates_length_of       :email,    :within => 3..100
  validates_format_of       :email, :with => /(^([^@\s]+)@((?:[-_a-z0-9]+\.)+[a-z]{2,})$)|(^$)/i
  validates_uniqueness_of   :login, :email, :case_sensitive => false
  before_create :make_activation_code
  before_save :encrypt_password
  has_many  :characters
  
  def admin?
    !GameConfig.admin_player.nil? && GameConfig.admin_player.id == self.id
  end
  
  def name
    "#{self.login}"
  end
  
  def player_character
    self.characters[0] unless self.characters.nil?
  end

  # Authenticates a user by their login name and unencrypted password.  Returns the user or nil.
  def self.authenticate(login, password)
    u = find_by_login(login) # need to get the salt
    u && u.authenticated?(password) ? u : nil
  end

  # Encrypts some data with the salt.
  def self.encrypt(password, salt)
    Digest::SHA1.hexdigest("--#{salt}--#{password}--")
  end

  # Encrypts the password with the user salt
  def encrypt(password)
    self.class.encrypt(password, salt)
  end

  def authenticated?(password)
    crypted_password == encrypt(password)
  end

  def remember_token?
    remember_token_expires_at && Time.now.utc < remember_token_expires_at 
  end

  # These create and unset the fields required for remembering users between browser closes
  def remember_me
    self.remember_token_expires_at = 2.weeks.from_now.utc
    self.remember_token            = encrypt("#{email}--#{remember_token_expires_at}")
    save(false)
  end

  def forget_me
    self.remember_token_expires_at = nil
    self.remember_token            = nil
    save(false)
  end
  
   # Authenticates a player by their login name and unencrypted password.  Returns the player or nil.
    def self.authenticate(login, password)
      # hide records with a nil activated_at
      u = find :first, :conditions => ['login = ? and activated_at IS NOT NULL', login]
      u && u.authenticated?(password) ? u : nil
    end

    # Activates the user in the database.
    def activate
      @activated = true
      self.activated_at = Time.now.utc
      self.activation_code = nil
      self.save!
    end

    # Returns true if the player has just been activated.
    def recently_activated?
      @activated
    end
    
    def forgot_password
     @forgotten_password = true
     self.make_password_reset_code
   end

   def reset_password
     # First update the password_reset_code before setting the 
     # reset_password flag to avoid duplicate email notifications.
     update_attributes(:password_reset_code => nil)
     @reset_password = true
   end

   def recently_reset_password?
     @reset_password
   end

   def recently_forgot_password?
     @forgotten_password
   end

 protected
    def make_password_reset_code
     self.password_reset_code = Digest::SHA1.hexdigest( Time.now.to_s.split(//).sort_by {rand}.join )
   end
   
    def make_activation_code
      self.activation_code = Digest::SHA1.hexdigest( Time.now.to_s.split(//).sort_by {rand}.join )
    end
    
    # before filter 
    def encrypt_password
      return if password.blank?
      self.salt = Digest::SHA1.hexdigest("--#{Time.now.to_s}--#{login}--") if new_record?
      self.crypted_password = encrypt(password)
    end
    
    def password_required?
      crypted_password.blank? || !password.blank?
    end
end
